package net.strandbygaard.android.owdroid;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class ReadingsDbAdapter {

	public static final String KEY_ROWID = "_id";
	public static final String KEY_DEVICEID = "Id";
	public static final String KEY_NUMBER = "No";
	public static final String KEY_LOCATION = "Location";
	public static final String KEY_TEMPERATURE = "Temp";
	public static final String KEY_HUMIDITY = "Hum";

	private static final String TAG = "ReadingsDbAdapter";
	private DatabaseHelper mDbHelper;
	private SQLiteDatabase mDb;

	private static final String DATABASE_CREATE = "create table readings ("
			+ KEY_ROWID + " integer primary key autoincrement, " + KEY_DEVICEID
			+ " text not null, " + KEY_NUMBER + " text not null, "
			+ KEY_LOCATION + " text not null, " + KEY_TEMPERATURE
			+ " text not null, " + KEY_HUMIDITY + " text not null);";

	private static final String DATABASE_NAME = "data";
	private static final String DATABASE_TABLE = "readings";
	private static final int DATABASE_VERSION = 2;

	private final Context mCtx;

	private static class DatabaseHelper extends SQLiteOpenHelper {

		DatabaseHelper(Context context) {
			super(context, DATABASE_NAME, null, DATABASE_VERSION);
		}

		@Override
		public void onCreate(SQLiteDatabase db) {

			db.execSQL(DATABASE_CREATE);
		}

		@Override
		public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
			Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
					+ newVersion + ", which will destroy all old data");
			db.execSQL("DROP TABLE IF EXISTS readings");
			onCreate(db);
		}
	}

	/**
	 * Constructor - takes the context to allow the database to be
	 * opened/created
	 * 
	 * @param ctx
	 *            the Context within which to work
	 */
	public ReadingsDbAdapter(Context ctx) {
		this.mCtx = ctx;
	}

	/**
	 * Open the readings database. If it cannot be opened, try to create a new
	 * instance of the database. If it cannot be created, throw an exception to
	 * signal the failure
	 * 
	 * @return this (self reference, allowing this to be chained in an
	 *         initialization call)
	 * @throws SQLException
	 *             if the database could be neither opened or created
	 */
	public ReadingsDbAdapter open() throws SQLException {
		mDbHelper = new DatabaseHelper(mCtx);
		mDb = mDbHelper.getWritableDatabase();
		return this;
	}

	public void close() {
		mDbHelper.close();
	}

	public void reset() {
		mDbHelper = new DatabaseHelper(mCtx);
		mDb = mDbHelper.getWritableDatabase();
		mDbHelper.onUpgrade(this.mDb, 1, 1);
	}

	/**
	 * Create a new note using the title and body provided. If the note is
	 * successfully created return the new rowId for that note, otherwise return
	 * a -1 to indicate failure.
	 * 
	 * @param title
	 *            the title of the note
	 * @param body
	 *            the body of the note
	 * @return rowId or -1 if failed
	 */
	public long createReading(String id, String number, String location,
			String temperature, String humidity) {
		ContentValues initialValues = new ContentValues();
		initialValues.put(KEY_DEVICEID, id);
		initialValues.put(KEY_NUMBER, number);
		initialValues.put(KEY_LOCATION, location);
		initialValues.put(KEY_TEMPERATURE, temperature);
		initialValues.put(KEY_HUMIDITY, humidity);

		return mDb.insert(DATABASE_TABLE, null, initialValues);
	}

	/**
	 * Delete the note with the given rowId
	 * 
	 * @param rowId
	 *            id of note to delete
	 * @return true if deleted, false otherwise
	 */
	public boolean deleteReading(long rowId) {

		return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
	}

	/**
	 * Return a Cursor over the list of all notes in the database
	 * 
	 * @return Cursor over all notes
	 */
	public Cursor fetchAllReadings() {

		return mDb.query(DATABASE_TABLE, new String[] { KEY_ROWID,
				KEY_DEVICEID, KEY_NUMBER, KEY_LOCATION, KEY_TEMPERATURE,
				KEY_HUMIDITY }, null, null, null, null, KEY_NUMBER);
	}

	/**
	 * Return a Cursor positioned at the note that matches the given rowId
	 * 
	 * @param rowId
	 *            id of note to retrieve
	 * @return Cursor positioned to matching note, if found
	 * @throws SQLException
	 *             if note could not be found/retrieved
	 */
	public Cursor fetchReading(long rowId) throws SQLException {

		Cursor mCursor =

		mDb.query(true, DATABASE_TABLE, new String[] { KEY_ROWID, KEY_DEVICEID,
				KEY_NUMBER, KEY_LOCATION, KEY_TEMPERATURE, KEY_HUMIDITY },
				KEY_ROWID + "=" + rowId, null, null, null, null, KEY_NUMBER);
		if (mCursor != null) {
			mCursor.moveToFirst();
		}
		return mCursor;

	}

	/**
	 * Update the reading using the details provided. The note to be updated is
	 * specified using the rowId, and it is altered to use the title and body
	 * values passed in
	 * 
	 * @param rowId
	 *            id of note to update
	 * @param title
	 *            value to set note title to
	 * @param body
	 *            value to set note body to
	 * @return true if the note was successfully updated, false otherwise
	 */
	public boolean updateReading(long rowId, String id, float temperature,
			float humidity) {
		ContentValues args = new ContentValues();
		args.put(KEY_DEVICEID, id);
		args.put(KEY_TEMPERATURE, temperature);
		args.put(KEY_HUMIDITY, humidity);

		return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
	}
}
